Abstract
Marine structures are nowadays used in a variety of ways. The analysis of a tripod-type offshore structure sixty m in total height is performed in this study. In addition to operation-related loads, the structure is also under the effect of wind and wave loads. While the Eurocode velocity profile is used to calculate wind forces, the Airy wave velocity profile is utilized to determine wave forces. The model is created by a finite elements analysis program, and is composed of fluid and structural parts. The interaction of the parts is ensured by Coupled Eulerian Lagrangian (CEL) technique.
Highlights
Energy requirement increases with an increase in the world’s population
Finite element supported fluid-structure interaction analyses can be performed by Eulerian method alone [13], Lagrange method alone [14] or Arbitrary Lagrangian Eulerian (ALE) [15, 16] and Coupled Eulerian Lagrangian (CEL) [17, 18] methods in which both methods are utilized
While the structure is modelled as Lagrangian part, fluid is modelled as Eulerian part in ALE and CEL analyses
Summary
Energy requirement increases with an increase in the world’s population. Energy supply and storage facilities in the open seas develop due to depletion of fossil fuels on land and increase in the cost of land. The practice of building wind turbines on offshore structures has been rapidly increasing in recent times These structures provide services as floating structures or as structures that are anchored to sea bottom. One of the methods used to determine dynamic behaviour of offshore structures is the fluid-structure interaction analysis. By using the traditional Eulerian description/mesh in which the numerical grid is fixed in space when water flows through the grid, fluid motion in CEL can be defined. Analytical [22], numerical [23] and experimental methods [24] have been used to model dynamic behaviour of the pile-supported offshore structures. The dynamic behaviour of structures under the effect of wind and wave forces is investigated by semi-analytical and numerical methods. Differences between numerical and semi analytical models are determined in terms of displacements and natural frequencies
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